1996 grand cherokee charging problem when really cold
I have changed the altenator the belt the battery the pullys and I
still have the gage go down to 0 when it is cold out. When I
start the truck it will go to 14 after 10 min it drops to 0. When
driving it is fine but when I stop at a red light it will drop again to
0. I dont know what else to change.
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I had an 89 Cherokee with a 4.0 liter and the alternator had adjusting bolts under it for belt tension.
Most vehicles now have a tension pully that is spring loaded and you just have to rock the pully away from the belt with a wrench. BE CAREFUL, that spring is extremely strong and will spring back on you if released. Its a good knuckle buster..
Disconnect the battery
Remove the supentine belt from the altenator pully, you can use a 3/8" drive breaker bar on the belt tensioner, just insert into the square slot on the tensioner and rotate it clockwise.
Remove the power wire and the harness
Remove the mounting bolts 1 under and 2 on the sides.
Just reverse the process to install the new altenator.
Make sure the supentine belt is in the proper position.
Make sure the battery is charged before starting, a drained battery can damage the FETs on the new altenator.
First clean the battery terminals & their connection to the battery. Check to see if the alternator belt is tight. Once started, connect an amp. meter to thebattery terminals. Black to black, red to red. If the reading is over 13.2, alternator is charging. If it is not, change the alternator. If it is over 13.2, you may need a new battery. Have a load test done at any reputable automotive store. Hope this helps & if it does please do the right thing & recommend this advice. Thanks
One belt to replace, get the correct belt and wrap around all pullys, smooth pullys get smooth side of belt and rigid pullys get rigid side of belt, loosen altenator for removal and remounting then moove back to position and tighten.